document.write( "Question 467328: I'm really stuck on this word problem.word problem are my weakness: It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The radiator now has 40 liters of 20% solution. How many liters of this should be drained and replaced with 100% anitfreeze to get the desired strength? \n" ); document.write( "
Algebra.Com's Answer #320662 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Let represent the amount drained (and the amount of 100% anti-freeze). Then the amount of anti-freeze that remains after draining gallons is . 20% of that which remains is antifreeze, to which you want to add gallons of 100% antifreeze which is, by definition, gallons of antifreeze. The two add up to 40 gallons of 40% antifreeze which is 16 gallons of antifreeze, so:\r
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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